TM 11-6625-3053-14
STEP
OPERATION
NORMAL INDICATION
CORRECTIVE ACTION
1
DS1 does not light up (green) when S1 set to ON.
Remove equipment dust cover (para 6-20).
Set modulation switch to RF OFF & POWER switch to ON.
Using the multimeter, set it for the 1000 VAC range and measure AC
voltage across terminals. 1 & 2 of input Xfmr T1.
Voltmeter should read between 105 VAC and 125 VAC.
If this reading is obtained, replace DS1.
If this reading is not obtained, go to item 4.
2
B1 does not run when S1 set to ON.
Remove equipment dust cover (para 6-20).
Set MODULATION switch S3 to RF OFF and reset POWER ON.
Using the multimeter, set it for the 1000 VAC range and measure the
voltage across the two blower terminals.
Voltage should read between 105 and 125V.
If this reading is obtained, replace B1.
If this reading is not obtained, go to item 4.
3
DS2 does not light when S1 set to ON.
Remove equipment dust cover (para 6-20). Set modulation Switch S3 to
RF OFF and Reset POWER ON.
Using a multimeter set for the 100 VAC range, measure the voltage
between the center conductor of the socket and the shell of the socket.
Voltage should read between 30 and 35 VAC.
If this reading is obtained, replace DS1.
If this reading is not obtained, go to item 4.
6-50